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void R232_USART1_Init(void)
{
huart1.Instance = USART1;
huart1.Init.BaudRate =115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
{
Error_Handler();
}
HAL_UART_Receive_IT(&huart1,&Res,1);
}void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart ->Instance==USART1)
{
// HAL_UART_Receive_IT(&huart1,APP_BUF,10);
HAL_UART_Receive_IT(&huart1,&Res,1);
}
}
使用 HAL_UART_Receive_IT(&huart1,&Res,1); 每接收一个字节的数据触发一次中断，上位机那边发5A f5 11 01 02 03 04 0A 5F A5这10个字节的字符串，串口接收中断，在接收到第二个字节也就是f5 后，就没有进入中断了，而使用 HAL_UART_Receive_IT(&huart1,&Res_buf,10)这个语句可以正常接收10个字节数据，感觉不像是速度的原因，平台为stm32ZIT6，时钟配置如下
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Supply configuration update enable
*/
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
/*****
RCC_HSE_ON为外置晶振模式，高速外部 (HSE) 时钟可以使用一个 4 到 48 MHz 的晶振 / 陶瓷谐振振荡器产生；
RCC_HSE_BYPASS为旁路模式，用户直接提供4-50MHz的时钟源即可，可以使用有源晶振或者FPGA提供时钟等方式
本项目开发板HSE直接由外接8MHz晶振提供，应选 RCC_HSE_ON
学习过程中开发板H755、H723等由ST-LINK芯片发生的时钟源提供，应选 RCC_HSE_BYPASS
******/
//此处HSE_VALUE=8MHz
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 200;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_0;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
|RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;//选择PLLCLK为时钟接口，此处由有源晶振分频下来为HSE_VALUE(8MHz)*PLLN(200)/[PLLM*PLLP(8*2)]=100MHz
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV2;//系统时钟二分频 HCLK*4=SYSCLK*2=100MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;//HCLK二分频
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;//APB1二分频
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;//APB2=25MHz
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
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发表于 2025-6-30 11:39:40
发表于 2025-6-30 16:27:39
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